How do you write the D flip flop code in Verilog?

We will program JK Flip Flop in Verilog and write a testbench for the same code.

1. module jk_ff ( input j, input k, input clk, output q);
2. reg q;
3. always @ (posedge clk)
4. case ({j,k})
5. 2’b00 : q <= q;
6. 2’b01 : q <= 0;
7. 2’b10 : q <= 1;
8. 2’b11 : q <= ~q;

What flipflop does the Verilog code analogues?

There are two types of D Flip-Flops being implemented: Rising-Edge D Flip Flop and Falling-Edge D Flip Flop. D flip flop is an edge-triggered memory device that transfers a signal’s value on its D input to its Q output when an active edge transition occurs on its clock input.

How do you create a counter in Verilog?

Electronic Counter Example

1. module counter (input clk, // Declare input port for the clock to allow counter to count up.
2. input rstn, // Declare input port for the reset to allow the counter to be reset to 0 when required.
3. output reg[3:0] out); // Declare 4-bit output port to get the counter values.

What is asynchronous D flip flop?

Asynchronous inputs on a flip-flop have control over the outputs (Q and not-Q) regardless of clock input status. These inputs are called the preset (PRE) and clear (CLR). The preset input drives the flip-flop to a set state while the clear input drives it to a reset state.

What is asynchronous reset in D flip flop?

Asynchronous reset flip-flops incorporate a reset pin into the flip-flop design. The reset pin is typically active low (the flip-flop goes into the reset state when the signal attached to the flip- flop reset pin goes to a logic low level.)

What is counter in HDL?

Counters use sequential logic to count clock pulses. You can implicitly implement a counter with a Register Inference. The Quartus II software can infer a counter from a Conditional (“If-Else”) Statement that specifies logic that adds or subtracts a value from the signal or register.

What is synchronous reset in D flip flop?

Synchronous resets are based on the premise that the reset signal will only affect or reset the state of the flip-flop on the active edge of a clock. The reset can be applied to the flip-flop as part of the combinational logic generating the d-input to the flip-flop.

What is a D-type flip flop?

The D flip-flop is widely used. It is also known as a “data” or “delay” flip-flop. The D flip-flop captures the value of the D-input at a definite portion of the clock cycle (such as the rising edge of the clock). That captured value becomes the Q output.

What is Verilog code?

Verilog is a HARDWARE DESCRIPTION LANGUAGE (HDL). It is a language used for describing a digital system like a network switch or a microprocessor or a memory or a flip−flop. It means, by using a HDL we can describe any digital hardware at any level.